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Passive broadband full Stokes polarimeter using a Fresnel cone.

R D Hawley1, J Cork2, N Radwell2

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This study introduces a novel static polarimeter using a Fresnel cone, offering a stable and cost-effective method for measuring light polarization. It achieves high accuracy across the visible spectrum for various polarization states.

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Area of Science:

  • Optics and Photonics
  • Polarimetry
  • Light-Matter Interactions

Background:

  • Light polarization provides crucial information about its origin and interactions.
  • Conventional polarimeters often use birefringent or rotating elements, limiting wavelength range and stability.
  • A need exists for robust, broadband, and cost-effective polarimetry techniques.

Purpose of the Study:

  • To present a static, single-shot polarimeter.
  • To demonstrate its performance across the visible spectrum.
  • To explore its potential applications in advanced imaging and spectroscopy.

Main Methods:

  • Development of a static polarimeter utilizing a Fresnel cone.
  • This design is a spatial analogue to rotating quarter-wave plate methods.
  • Characterization of polarization states (elliptical and linear) and degree of polarization.

Main Results:

  • Achieved average angular accuracy of 2.9° for elliptical and 3.6° for linear polarization.
  • Determined the degree of polarization with an accuracy of 0.12 for elliptical and 0.08 for linear states.
  • Demonstrated broadband performance across the visible spectrum.

Conclusions:

  • The Fresnel cone-based polarimeter is robust, cost-effective, and stable.
  • It offers a viable alternative to traditional polarimeters.
  • Potential applications include hyper-spectral polarimetry and scanning microscopy.